用单词的适当形式完成短文

Do you know the man wrote this book？He was Jason, one of the engineers came from Russia in the 1950s. He worked in the same factory my father once worked. When he came to China, the first thing he did was to visit the factory did research on trolleybuses and found out the reason China was so backward in it. Then he spent every minute he could spare to help China develop transportation. is mentioned above, Jason was a foreigner made great contributions to our country and was a kind man to we should say thanks.